Xu Jianguang, head of Shanghai municipal health bureau, speaks at a press conference in Shanghai, east China, May 3, 2009. Sixty-eight people who were on the same Mexico City-Shanghai flight with a Mexican national later diagnosed with influenza A/H1N1 in Hong Kong, have been located and are in quarantine in Shanghai, health officials told reporters Sunday. None have displayed any flu symptoms, according to Xu Jianguang. [Photo: Xinhua]

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Sixty-eight people who were on the same Mexico City-Shanghai flight with a Mexican national later diagnosed with influenza A/H1N1 in Hong Kong, have been located and are in quarantine in Shanghai, health officials said Sunday.

None have displayed any flu symptoms, according to Xu Jianguang, head of the municipal health bureau.

The Mexican, a 25-year-old male, arrived in Shanghai Thursday aboard flight Aeromexico 098, which carried 176 passengers and 13 crew members. The Mexican, together with some other passengers, flew on to Hong Kong, taking China Eastern Airlines flight MU505.

The week-long quarantine in Shanghai affects 48 passengers whose destination was Shanghai, seven who intended to go on to other destinations, and 13 crew members.

They were divided into two groups in two hotels, one in Nanhui district, the other in Pudong district.

Fifty-nine relatives of the 48 Shanghai passengers were ordered to remain at home for observation.

Another 28 people who had close contacts with the Mexican at the airport were also under observation at home. They include two customs staff, eight border police, six China Eastern staff and 12 safety inspectors.

Among the 176 passengers on AM098, excluding the 55 in Shanghai, 111 went to 18 Chinese provinces and municipalities, which have taken similar measures against the epidemic, while 10 others left the Chinese mainland, going to Japan, Thailand and Hong Kong.

None of the passengers quarantined in China had shown flu symptoms as of Sunday noon, China's health ministry said.

The Mexican became Hong Kong's first confirmed case of influenza A/H1N1 infection Friday. It was also the first such case in Asia.

Following the outbreak, the Chinese government suspended flights from Mexico to Shanghai starting Saturday. It said it depends on the flu outbreak situation as when to resume the flights.

China has sent a chartered flight to pick up 120 or so stranded Chinese citizens in Mexico. The passengers and crew on the Southern China Airlines flight, which is expected to arrive in Shanghai Tuesday morning, will also be quarantined.